Electrical switchboard.



J. A. VSGHABPER. ELECTRICAL SWITCHBOARD.

APPLICATION PILED'JULY 15, 1907.

Patented May 31, 1910.

. VW y www? a y@ UNITED. STATES PATENT?onirica;-I

.IosEPH A. scHAErER, or cHIcAGo, ILLINOIS, AssIGNoR To JOHN scHAEFER, or

' CHICAGO, ILLINOIS.

ELECTRICAL SWITCHBOARD.

boards, of which the following is a' full,

clear, concise, and exact description, refer-` ence being had to the accompanying drawings, forming a part of this specification.

My invention relates to electrical apparatus, and-has for its object the provision of an improved mounting therefor.

M invention linds a veryv useful application 1n connection with power switch-board s, for by means of it, regulable electrical apparatus may be mounted, in improved `fashion, upon one side ofthe switch-board, and the means for elfecting the operation of the apparatus may be provided upon the other side of the switch-board.

In switch-board work, avery useful embodiment of the invention includes a rheolstat.

My invention, in one of its preferred emvbodiments, will be very readily understood irl-Plaa, is desir-'ably adjustbly effected by l by reference to the accompanying drawing, in which- 'i Figure l is a sectional View on line 1--1 of Fig. 2. Fig. 2 isa Vertical sectional view on line 2 2 of Fig. 1. Fig. 3 is a'view in perspective illustrating the manner-of coulp- ,I t 1e ling the switch-arm o he rheostat, with t operating shaft.

Like'parts'are indicatedby similar characters of 'reference throughout the different The switch-board includes a board or plate a of'suitable insulating' material, such as slate or marble, which has provided therethrough an aperture b, through which aperture there. is laced a sleeve or tube c threaded upon lts exterior and clamped inposition by means of' a nut d upon the face oftheboard and a nut e upon the back of the board..4 The `nut e is desirably constantly maintained in fixed relation with the tube 'c' by means of aset-screw f, whereby the nut e4 u and Asaid tube may, in eiect, yconstitute a unitarystructurathe' elements c and e being threaded together 'merely for purpose of Structural convenience and assemblage;l The clamping action whereby the tube c is held l.Patented May 3,1, 1910.'

the nut d, to which end the nut d is provided with a threaded bore that projects considerably forward of the sleeve c to afford suiiicient room for adjustment. The nut d 1s deslrably of'special desigin'and prefverably has an extended liange portion g, the rim of the flange portion alone bearing upon the board a., some clearance intervening between the balance of the face ofthe nut and the board, so as to permit a very firm clamp- 111g action, which is further promoted bythe slight degree of resiliency that is aHorded by reason of the aforesaid slight clearance between the face of the nut d andthe board a. The nut-e, similarly, is provided with a flangeh that engages the back face of the4 board a, clearance intervening'between the balance of the nut e and the .board a foralso serving to secure' better clamping action.

Another feature of my invention resides in providing a mounting for the electricalV apparatus that 1s tobe supported upon the rear of the board, whichmounting 1s carried by the nut e and which is preferably lintegrally formed therewith. .This mounting, in the Vembodiment'. of the invention illustrated, resides in a housing h1 which is cup-shaped in the embodiment illustrated,

this housing being outwardly flanged at z' to receive an insulating base k upon which are mounted rheostat contacts Z. The base le and the housing h1 may be united in any suitable way, as, lfor example, by means of fastening screws k1. The housing incloses av traveling switch-arm m of well-known construction, which switch-arm has a stations.

bearing n in the form of a stub-shaft threa ed at its rear end where it passes throu h an aperture in the base lo. AThe nut o is d1s' pose upon one side of the base k anda sec; ond nut p is disposed u'pon the other side,v these two nuts acting, b Y I threaded engagement wit the shaft 'n' and their location With'respect to the base c, to 'clam said shaft in fixed position. AvThe switc -arm m is rovided with a suitable operating lever or andle, such as the handwheel g', upon the front face of the Switchs-4 board. This hand-wheel is united with the switch-arm, preferably4 by means` O f the structural' partsfillustrated. For the purpose of this union of said wheel .and said switch-arm, I have provided a rotating shaft r which is clamped to the wheel g by means of the set-screw r1, this shaft fr extending through the bores in the nuts al and eA and the sleeve or tube c. The shaft 1' projects into the housing l1, and there supports a carrier s, a set-screw t ,the relation of shaft and carrier. The carrier s, which is preferably of metal, supports a block of insulating material u, which block of insulating material is attached to said carrier by means of screws c. The switcharm m is attached, in turn', to the block u by means of screws rw. The portions of the carrier s and the switch-arm that are united with the block of insulating material u, are preferably shaped as indicated most clearly in Fig. 3,these portions of these elements `being disposed angularly with respect to each other, whereby the screws lv and w may findproper passage to effect mechanical union of the swltch-arm with the operating shaft without occasioning electrical connection between these two parts.

While I have herein shown `and particularly described one embodiment of my invention and one .application thereof, I do not wish to be limited to the precise use to 4which my inventionfis put, nor to the preoise embodiment thereof illustrated, as Y and adaptations .thereof `may be y' -my name this 12th dig made without departing from the spirit of my invention, but,

Having thus described my invention, I claim as new and desire to secure by Letters- Patent An electrical switchboard including Ia foundation plate a of insulating material, a lhousing h disposed to the rear of said plate, said housing having a flange h that engages the back face of the plate, saidvhous ing also carrying a nut e inclosed by said flange, clearanceintervening between said plate and-nut to secure better clamping ac# tion'between the nutand the part with which it has threaded engagement, a threaded sleeve passing through an aperture in said plate and into threaded connection with saidnut, a nut d on the opposite side of said plate from Where the housing is disposed having threaded connection with said sleeve c, sald nut-d having an extended flange portion g, the rim ofwhich alone engages the`plate.- a, a shaft r ypassing freely .v

through the nuts d vand e and the sleeve c and into lthe housing h', an operating lever -g upon the front end vof said shaft, and a switch arm within the housing h upon'the otherend of said shaft.

In witnesswhereof, I hereunto subscribe of Jul A. D., 1907. A. S HAEFER.V

JOSEP Witnesses: -v

` 'G. L. CRAGG, 

